scholarly journals Assessment of toxic metal contamination with ecological risk of surface water and sediment of Korotoa River in Bangladesh

2018 ◽  
Vol 6 (2) ◽  
pp. 214 ◽  
Author(s):  
Ram Proshad ◽  
Md. Saiful Islam ◽  
Tapos Kormoker ◽  
Md. Emam Mehedi Masud ◽  
Mir. Mohammad Ali
Keyword(s):  
Surface Water ◽  
Water Samples ◽  
Metal Contamination ◽  
Toxic Metal ◽  
Industrial Effluents ◽  
Agricultural Runoff ◽  
Average Concentration ◽  
Contamination Level ◽  
Water And Sediment ◽  
Toxic Metal Contamination

Toxic metal contamination is a major problem globally, especially in developing countries. In this study, the levels of toxic metals such as Cr, Ni, Cu, As, Cd and Pb in surface water and sediment of Korotoa River of Bogra City, Bangladesh were investigated. The average concentration of Cr, Ni, Cu, As, Cd and Pb in studied sediment were 1.01, 0.89, 1.98, 6.02, 0.0054 and 0.469 mg/kg, respectively. In the water sample, the mean concentration of Cr, Ni, Cu, As, Cd and Pb were 1.13, 1.33, 3.02, 2.62, 0.75 and 0.81 mg/kg, respectively. A huge amount of municipal wastes, industrial effluents and agricultural runoff from the periphery of Bogra City notably are dumped to this river. Most of the effluents channeled into these rivers are not treated. Considering the sampling sites, the decreasing order of total metal concentration in water samples were Cu > As > Ni > Cr > Pb > Cd and in sediment were As > Cu > Cr> Ni > Pb > Cd. Total average concentrations of Cr, Ni, Cu, As, Cd and Pb in the water samples were higher than WHO guidelines for drinking water quality. This contamination level implied that the condition is much frightening and probably severely affecting the aquatic ecology of the river.  

scholarly journals Toxic Metal Contamination of Locally Produced Tobacco in Tamale Metropolis in Northern Region of Ghana

2020 ◽  
pp. 15-25
Author(s):  
G. E. Sebiawu ◽  
N. J. Mensah ◽  
E. Amankwah ◽  
S. Antwi-Akomeah
Keyword(s):  
Metal Contamination ◽  
Toxic Metal ◽  
Northern Region ◽  
Contamination Level ◽  
Permissible Limits ◽  
Flame Atomic Absorption ◽  
Flame Atomic Absorption Spectrophotometer ◽  
Tamale Metropolis ◽  
The Mean ◽  
Toxic Metal Contamination

The study was to analyze and determine the toxic metal contamination level of locally produced tobacco sold in the Tamale Metropolis of Northern region. The study was carried out at the Tamale Metropolis of Northern region of Ghana within a period of 12 months. The study focused on the analyses of five (5) toxic metal contaminants in twelve (12) variant locally produced tobacco sold in various spots within the Tamale Metropolis of Ghana. Toxic metals including As, Cd, Hg, Pb and Cr were analyzed using Flame Atomic Absorption Spectrophotometer. The mean recorded concentrations of As, Cd, Hg, Pb and Cr were respectively in the ranges of 0.184 ± 0.011 to 0.515 ± 0.015 µg/kg, 0.0420 ± 0.010 to 3.100 ± 0.000 µg/kg, 0.176 ± 0.016 to 0.291 ± 0.009 µg/kg, 1.169 ± 0.019 to 3.195 ± 0.019 µg/kg and 1.600 ± 0.116 to 3.880 ± 0.369 µg/kg. The mean concentrations of As and Pb measured in all samples tested were below their respective WHO permissible limits of 4.00 ppm and 10.00 ppm. In the case of Cd, mean concentrations measured for all locally produced tobacco tested were above the WHO permissible limits of 0.30 ppm. For the metal Hg, levels measured in 75% of tested locally produced tobacco were slightly above the WHO permissible limit of 0.20 µg/kg. Cr levels measured in 30% of tested locally produced tobacco were below the WHO permissible limits of 2.00 µg/kg. The very presence of these metals typically raises health concerns on consumption in the instances where their levels exceeded permissible guideline limits. The study revealed that Cd, Hg and Cr levels in the locally produced tobacco studied were found to exceed the WHO permissible limits for human consumption by plant uptake with As and Pb levels well below their permissible thresholds. The analyzed locally produced tobacco essentially poses a threat of heavy metal toxicity to consumers via bioaccumulation and bio-concentration in human tissues.

scholarly journals Contamination level of Bisphenol A in surface waterfrom urban rivers and lakes of Hanoi city

2021 ◽  
Vol 63 (11) ◽  
pp. 24-28
Author(s):  
Thuy Ngoc Nguyen ◽  
◽  
Thi Kim Truong ◽  
Thi Lan Anh Phan ◽  
Thi Vi Phung ◽  
...  
Keyword(s):  
Surface Water ◽  
Bisphenol A ◽  
Water Samples ◽  
Endocrine Disrupting Chemicals ◽  
Treatment Plant ◽  
Average Concentration ◽  
Consumer Products ◽  
Contamination Level ◽  
The European Union ◽  
Rivers And Lakes

Bisphenol A (BPA) is a precursor chemical to produce polycarbonate plastics and epoxy resins that have been widely used in the world with many essential daily applications. BPA is considered one of the endocrine-disrupting chemicals in animals, which causes harmful effects on health. Besides, BPA originates from resins and consumer products after use has been released into the environment. To assess the contamination level of BPA in surface water, this study collected and analysed water samples from rivers and lakes in the centre of Hanoi. The average concentration of BPA in 45 surface water samples was 76.8 ng/l (6.6-284 ng/l). The highest concentration of BPA was found at the surrounding area of the wastewater treatment plant in Yen So (177 ng/l), followed by the Yen So lake (86.9 ng/l), To Lich and Nhue rivers (~80 ng/l), Lu, Set, Kim Nguu rivers (~60 ng/l) and the lowest level in West Lake (20.1 ng/l). The BPA levels in surface water were much lower than the predicted no-effect concentration (PNEC) which is used to assess the environmental risk to protect the aquatic organism from the European Union.

scholarly journals Heavy Metal Content in Water of Resko Lake (North-West Poland)

2013 ◽  
Vol 13 ◽  
pp. 279-287 ◽  
Author(s):  
Piotr Daniszewski ◽  
Ryszard Konieczny
Keyword(s):  
Surface Water ◽  
Water Samples ◽  
Metal Content ◽  
Research Work ◽  
Average Concentration ◽  
Permissible Limit ◽  
Toxic Heavy Metals ◽  
Annual Average ◽  
North West ◽  
Annual Average Concentration

The present research work deals with the quantification of toxic heavy metals in the water samples collected from Lake of Resko (North-West Poland). While the annual average concentration of Cadmium was calculated as 0.34 ppm in 2008 of the year and 0.28 ppm in 2009 of the year. The values obtained were found to be below the permissible limit of 2.0 ppm set for inland surface water. While the annual average concentration of Chromium was calculated as 1,75 ppm in 2008 of the year and 1.97 ppm in 2009 of the year. Which was very much above the permissible limit of 0.1 ppm set for inland surface water. The observed annual average concentration of Copper in the water was 0.05 ppm in 2008 of the year and 0.06 ppm in 2009 of the year, which was below the permissible limit of 3.0 ppm set for inland surface water. While the annual average concentration of Mercury was calculated as 0.03 ppm in 2008 of the year and 0.04 ppm in 2009 of the year, which was very much above the maximum limit of 0.01 ppm set for inland surface water. The annual average concentration of Nickel in the water samples was observed to be 2.07 ppm in 2008 of the year and 2.09 ppm in 2009 of the year, which is close to the limit of 3.0 ppm set for inland surface water. The annual average concentration of Pb in the water samples was observed to be 0.07 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which is above the permissible limit of 0.1 ppm set for inland surface water. The results of the present investigation indicate that the annual average concentration of Zn in water samples was 3.02 ppm in 2008 of the year and 2.74 ppm in 2009 of the year, which is above the permissible limit of 5.0 ppm set for inland surface water.

Heavy metal contamination in surface water and sediment of the Meghna River, Bangladesh

2017 ◽  
Vol 8 ◽  
pp. 273-279 ◽  
Author(s):  
Md. Simul Bhuyan ◽  
Muhammad Abu Bakar ◽  
Aysha Akhtar ◽  
M. Belal Hossain ◽  
Mir Mohammad Ali ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Surface Water ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Water And Sediment

Toxic metal contamination of folk remedy

JAMA ◽  
1984 ◽  
Vol 252 (22) ◽  
pp. 3127b-3127 ◽  
Author(s):  
F. D'Alauro
Keyword(s):  
Metal Contamination ◽  
Toxic Metal ◽  
Folk Remedy ◽  
Toxic Metal Contamination

scholarly journals Urban Occupation Increases Water Toxicity of an Important River in Central Brazil

2020 ◽  
Vol 9 (1) ◽  
pp. 73-86
Author(s):  
Elisa Flávia Luiz Cardoso Bailão ◽  
Leciana de Menezes Sousa Zago ◽  
Nathan Carvalho Silva ◽  
Karine Borges Machado ◽  
Patrícia Lima D'Abadia ◽  
...  
Keyword(s):  
Surface Water ◽  
River Water ◽  
Environmental Quality ◽  
Chromosomal Aberrations ◽  
Water Samples ◽  
Industrial Effluents ◽  
Dna Integrity ◽  
Aquatic Biota ◽  
Dna Breaks ◽  
Central Brazil

Meia Ponte River supplies water for two million people in Goiás State, Brazil. Despite its importance, the Meia Ponte River faces serious environmental problems such as the disposal of domestic and industrial effluents, what could impact the aquatic biota and the health of people who consumes its water. In this sense, here we aimed to evaluate the environmental quality and toxicity of surface water along the course of this river. Physicochemical analyses of water at Goiânia urban perimeter were higher than the limits of Brazil environmental regulations for fresh water. In relation to the diversity of species, phytoplankton classes associated to polluted environments were detected closer to urban perimeter. Allium cepa bioassay suggested that this river may contain substances with mitogenic activity. This result is in accordance with genotoxic analysis, because it was observed a significant increase in chromosomal aberrations. This data reveal the genotoxic potential of Meia Ponte River water. This genotoxicity represents a risk for aquatic biota and humans, once the genotoxic agents in water samples might cause the loss of DNA integrity, inducing damages and DNA breaks. In this context, the water utilization from Meia Ponte River without any treatment should be avoided and public policies need to be formulated and implemented to depollute this important river for Goiás State.

Spatio-temporal variation level of heavy metals in surface water and sediment in Tagwai Lake, Minna, Nigeria

2020 ◽  
Vol 29 (1) ◽  
pp. 123-131
Author(s):  
V.I. Chukwuemeka ◽  
E.A. Jimoh ◽  
K.O. Olajide ◽  
Y.I. Auta ◽  
H.S. Auta ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Surface Water ◽  
Anthropogenic Activities ◽  
Absorption Spectrometry ◽  
Average Concentration ◽  
Toxic Heavy Metals ◽  
Water And Sediment ◽  
The Mean ◽  
Spatio Temporal ◽  
Standard Range

The high contamination of aquatic systems with toxic heavy metals is of major concern since the elements are not biodegradable. Heavy metals often get into the water through runoff from farmlands and dumping of effluents from industries into the water bodies. The toxicity of these heavy metals can cause harmful and even lethal effects on the human health. The objective of this study was to investigate the level of Pb, Cu, Mn, and Fe in both surface water and sediment of Tagwai Lake. Atomic Absorption Spectrometry investigation was carried out on the collected and digested water and sediment samples to determine the extent of these heavy metals contamination in the water. The results showed that the average concentration of heavy metals ranked in the following order: Pb>Mn>Cu>Fe with higher concentration in sediment compared to the water. The correspondence of the mean concentrations of heavy metals in water and sediment of the Tagwai Lake with the WHO standard suggests that the mean concentration of Pb, Cu, and Fe lies within the standard range while Mn exceeds the standard range in both the water and sediments. We therefore advocate regular surveillance as a tool for monitoring impacts of anthropogenic activities in the lake to ensure safety of the general populace who depend on it for their livelihood. Keywords: spatio-temporal, heavy metals, sediments, Tagwai Lake

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